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Roofing Calculator
Estimate shingles, underlayment, and roofing materials. Accounts for roof pitch, waste factor, and accessories.
Roof Dimensions
Horizontal measurement along the ridge
From eave to ridge (horizontal distance)
Roof Specifications
5% (Simple roof)20% (Complex roof)
Accessories
Material Estimate
Footprint Area1,000 sq ft
Pitch Multiplier1.054x
Actual Roof Area1,054 sq ft
+ 10% Waste1,159.4 sq ft
Roofing Squares
12 squares
(1 square = 100 sq ft)
Architectural Shingles
3 bundles per square
35
bundles
Additional Materials
Underlayment3 rolls
Ice & Water Shield6 rolls
Drip Edge13 pieces
Ridge Cap2 bundles
Starter Strip2 bundles
Roofing Nails80 lbs
Pro Tips
- Add 15-20% waste for complex roofs
- Check local codes for underlayment requirements
- Consider upgraded ventilation
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